This is a discussion on bad if the engine oil not sythetic?? within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; Originally Posted by Donkey
Plus the fact that most group IV synthetic can easy handle 7,500-10K oil change intervals.
i ...

Plus the fact that most group IV synthetic can easy handle 7,500-10K oil change intervals.

i dont really like that considering all oil gets dirty just as quick whether its $20 per quart godness or $1.50 per gallon generic vegetable oil. dirt and the leftovers of combustion are the main reasons for changing oil. personally i use castrol edge and change it every 4000

i dont really like that considering all oil gets dirty just as quick whether its $20 per quart godness or $1.50 per gallon generic vegetable oil. dirt and the leftovers of combustion are the main reasons for changing oil. personally i use castrol edge and change it every 4000

It's not a matter of like or dislike though. It's a matter of data. If an oil, any oil, still has adequate TBN and the detectable wear metals are low plus the free insoluble contaminants present are also low, both the oil and the filter are by definition suitable for continued use.

I have used oil analysis data indicating my choice of oil could easily exceed 8,000 miles in my motor under my conditions of typical use.

WRX Info Links, Courtesy TheJMan is a brute.... If you're cruel to him, he respects and fears you. If you're kind to him, he plucks your eyes out. Alexis ZorbasI lied. I cheated. I bribed men to cover the crimes of other men. I am an accessory to murder. But the most damning thing of all... I think I can live with it. And if I had to do it all over again - I would. Benjamin Sisko
DISCLAIMER: Opinions expressed are the author's alone and are inherently worthless.

I support oil threads. Just this morning I pondered my reoccurring fear; "What if the previous owner of my car used synthetic, and then I used the regular stuff, good god what if it's killing my whip!" Then I see another oil thread and it makes everything better.

Flow at colder temps has much more to do with the fluid's viscosity at that temp then whether is it synthetic or not.

Now, you can purchase a 0W synthetic where I've only ever seen a 5W oil available in dino oil form. The 0W synth will flow better than the 5W dino, but again that is a function of the viscosity at the low temps rather than fact the oil is made from a synthetic base oil.

Another synth-dyno tidbit: My lawnmower uses a Briggs & Stratton motor, and they recommend synthetic oil for the motor, saying that if synthetic is not used then oil consumption will increase. This is the opposite of what many users here report in their car motors.

(I tend to use whatever in the mower if it's new oil and I'm not against using the old M1 5W-40 Turbodiesel/Truck synth straight out of my WRX if I'm in the mood to change the oil in both the car and the mower).

WRX Info Links, Courtesy TheJMan is a brute.... If you're cruel to him, he respects and fears you. If you're kind to him, he plucks your eyes out. Alexis ZorbasI lied. I cheated. I bribed men to cover the crimes of other men. I am an accessory to murder. But the most damning thing of all... I think I can live with it. And if I had to do it all over again - I would. Benjamin Sisko
DISCLAIMER: Opinions expressed are the author's alone and are inherently worthless.

Another synth-dyno tidbit: My lawnmower uses a Briggs & Stratton motor, and they recommend synthetic oil for the motor, saying that if synthetic is not used then oil consumption will increase. This is the opposite of what many users here report in their car motors.

This time of year I use the mower to help with leaf and yard cleanup. Several years ago when the mower was new it would not start at around 50. What gives? It was a one pull starter in warmer weather.

I remembered the old Mobil 1 commercial. Figured I would give it a try in the Tecumseh powered Craftsman. Sure enough it started fairly easily, even down into the 30's. That sold me on the claim that synthetic flows better when cold.

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